barnard



(No Model.)

G. S SANFORD & H. H. BARNARD.

WHEEL BRAKE.

. 7; b a WITNESSES: 4/7 T/ w Cod. W 2 2 M m A'ri'oR'NEY UNITED STATESPATENT OFFICE.

GEORGE S. SANFORD AND HENRY ll. BARNARD, OF SYRACUSE, NEXV YORK; SAIDBARNARD ASSIGNOR TO SAID SANFORD.

WHEEL-BRAKE.

SPECIFICATION formingpart of Letters Patent No. 563,620, dated July '7,1896. Application filed February 24, 1896- $erial1lo. 580,405. (Nomodel.)

To all whom it may concern.-

Be it known that we, GEORGE S. SANFORD and HENRY II. Bnnnnnn, ofSyracuse, in the county of Onondaga, in the State of New York, haveinvented new and useful Improvements in Wheel-Brakes, of which thefollowing, taken in connection with the accompanying drawings, is afull, clear, and exactdescription.

This invention consists in an improved vehicle-brake which is positiveand most efficient in its operation and at the same time permits itsbraking force to be applied gradually and with greater or less force, asmay be desired, by the person operating the brake.

In the annexed drawings, Figure 1 is aside view of a bicycle-frameequipped with our improved wheel-brake. Fig. 2 is an enlarged detachedside view of the brake. Fig. is a front view of the same. Fig. i. is anenlarged detached side view of the springcoupling employed in theconnection of the operators hand-lever with the brakelever.

Similar letters of reference indicate corresponding parts.

0 represents a bicycle-frame, and a the rear axle of said bicycle. Tothis axle we fasten the supplemental wheel Z), the periphery of which weprefer to form V-shaped to increase the braking-surface and render thesame more effective in connection with the brake-shoes c and c, whichare shaped correspondingly.

The brake-shoes are segmental-shaped to embrace opposite peripheralportions of the wheel I) and are hinged together at one end, as shown atd, at which point they are yieldingly supported on the frame G by meansof a suitable spring e, as more fully illustrated by dotted lines inFig. 2 of the drawings. The opposite end of the shoe 0 is positively andpivotally connected to the frame 0 by a pin or bolt f, passing throughan ear g, formed on said end of the shoe, as more clearly shown in Figs.2 and 3 of the drawings. To the ear g is secured a double strap 72,which straddles an ear 1', formed on the adjacent end of the companionshoe 0, and to the free end of said strap is pivoted the eccentric j,which bears on the ear 2' and has a lever 7" extending rigidly from it.

To a suitable part of the bicycle-frame,

preferably to the front end thereof, we pivot a suitable lever l, theshaft Z of which has attached to it a suitable handle n, by which toturn the shaft and control the brake, which is connected to the lever lby means of a rod or wire 9', attached at one end to said lever and atthe opposite end to the free end of the eccentric-lever j Inasmuch as itrequires only a very slight draft on the wire or rod 0" to apply thebrake, we guard against too sudden application of the brake by formingthe said wire or rod of two end portions and couple said portionstogether by means of a spiral spring s, prefer ably by passing said endportions through the ends of a loop or swivel t and applying nuts 0 o tosaid ends of the rod or wire sections, which are screw-threaded for thatpurpose. The spring 3 is interposed between the nut o and inner end ofthe swivel, as illustrated in Fig. 4; of the drawings. The nut o 011 theother end portion of the wire or rod section serves as a means fortaking up the slack of the wire or rod. The aforesaid wire or rod may bearranged near the bottom of the frame 0, as shown by full lines in Fig.1 of the drawings, or near the top of said frame, as indicated by dottedlines, or any other suitable position.

The brake-shoes are normally spread apart to release the wheel 12 fromfrictional contact by means of a spring a, interposed between the ears iand g, as clearly shown in Fig. 2 of the drawings.

The brake is applied by the operator turning the handle a. This causesthe wire or rod 2' to turn the eccentric j, so as to compress thebrake-shoes c c on the periphery of the wheel I), designated thesupplemental wheel, in contradistinction to the main or traction wheel Dof the bicycle. The bicycle is released from the force of the brake bythe op erator releasing the handle or. The spring a is then allowed toexpand and spread the brake-shoes apart and from the periphery of thewheel, and when thus released the brake-shoes are supported out offrictional contact with the periphery of the wheel I) by the spring 6.

.Vhat we claim as our invention is- 1. A vehicle-brake consisting of asupplemental wheel fastened to the axle of the veopposite peripheralportions :of said vwheel and hinged together at one endand permanentlysupported by the opposite end of one of said shoes on the vehicle-frame,a spring interposed between saidend of the shoe and corresponding end ofthe companion shoe to:

normally spread the shoes apart, a strap secured to the supported end ofthe brakeshoe, an eccentric pivoted to said strap and bearing onthecorresponding end of the companion shoe, and a lever fixed to theeccentric for turning the same to compress the brake-shoes around thesupplemental Wheel as set forth.

2., The comhinatiomwith the vehicle frame and axle, of a supplementalwheel fixed to said axle, two segmental brake-shoes hinged together atone end and embracing opposite peripheral portions of said Wheel and permanently supported at the opposite end of one of said shoes on thevehicle-frame, a

spring interposed between the latter ends of the shoes to spread themapart and normally release the Wheel, a strap attached to the aforesaidsupported end of the brake-shoe, an eccentric pivoted to said strap andhearing on the adjacent end of the companion shoe, a lever extendingfrom the eccentric, a lever pivoted to the frame, and a Wire or rodconnecting said lever to the lever of the eccentric as set forth.

, p The combination with the vehicle frame and axle, of a supplementalWheel fixedto said axle, two brake-shoes hinged together at one end andembracing opposite peripheral eccentric pivoted to said strapand bearing011 the adjacent end of the companion shoe, and a lever fixed to theeccentric to compress thebrake-shoes aroundthewheel as set forth.

4. The combination With the vehicle frame and axle, of a supplementalWheelfixed to said axle, two brake-shoes hinged together at one end andyieldingly supported at said end on the aforesaid frame and positivelyconnected at the opposite end of one of the shoes to the frame, a springinterposed between said positively=connected end of the shoe andadjacent end of 'thecolnpanion shoe tospread said shoes apart, a strapconnected to said positively-connected end of the brake-shoe, aneccentric pivoted to said strap'and hearing on said companion shoe tocompress the shoes on the Wheel, a lever fixed to the eccentric, a leverpivoted to the frame, and a wire or rod and intermediate spring-coup lling connecting the said two lovers as set forth.

In testimony whereof We havehereunto signedour names this 15th day ofFebruary,

